浓硫酸焙烧高钛渣的反应动力学
提出一种新方法，利用浓硫酸焙烧高钛渣提取二氧化钛，并在焙烧工艺的基础上研究焙烧反应动力学。考察焙烧温度、粒度以及酸矿比对反应速率的影响。结果表明，焙烧反应符合未反应核收缩模型。动力学实验数据、SEM和EDAX结果分析表明，用浓硫酸焙烧高钛矿渣的反应受通过固体产物层的内扩散控制。Arrhenius方程得到焙烧反应的表观活化能为18.94 kJ/mol。...
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| Published in | 中国有色金属学报（英文版） no. 3; pp. 848 - 853 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | Chinese |
| Published |
东北大学 材料与冶金学院，沈阳 110819
2014
沈阳医学院 化学系，沈阳 110034%东北大学 材料与冶金学院,沈阳,110819 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | 提出一种新方法，利用浓硫酸焙烧高钛渣提取二氧化钛，并在焙烧工艺的基础上研究焙烧反应动力学。考察焙烧温度、粒度以及酸矿比对反应速率的影响。结果表明，焙烧反应符合未反应核收缩模型。动力学实验数据、SEM和EDAX结果分析表明，用浓硫酸焙烧高钛矿渣的反应受通过固体产物层的内扩散控制。Arrhenius方程得到焙烧反应的表观活化能为18.94 kJ/mol。 |
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| AbstractList | 提出一种新方法，利用浓硫酸焙烧高钛渣提取二氧化钛，并在焙烧工艺的基础上研究焙烧反应动力学。考察焙烧温度、粒度以及酸矿比对反应速率的影响。结果表明，焙烧反应符合未反应核收缩模型。动力学实验数据、SEM和EDAX结果分析表明，用浓硫酸焙烧高钛矿渣的反应受通过固体产物层的内扩散控制。Arrhenius方程得到焙烧反应的表观活化能为18.94 kJ/mol。 |
| Abstract_FL | A novel method of roasting high-titanium slag with concentrated sulfuric acid was proposed to prepare titanium dioxide, and the roasting kinetics of titania was studied on the basis of roasting process. The effects of roasting temperature, particle size, and acid-to-ore mass ratio on the rate of roasting reaction were investigated. The results showed that the roasting reaction is fitted to a shrinking core model. The results of the kinetic experiment and SEM and EDAX analyses proved that the reaction rate of roasting high-titanium slag with concentrated sulfuric acid is controlled by the internal diffusion on the solid product layer. According to the Arrhenius expression, the apparent activation energy of the roasting reaction is 18.94 kJ/mol. |
| Author | 隋丽丽 翟玉春 |
| AuthorAffiliation | 东北大学 材料与冶金学院，沈阳 110819; 沈阳医学院 化学系，沈阳 110034%东北大学 材料与冶金学院,沈阳,110819 |
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| Author_FL | Li-li SUI Yu-chun ZHAI |
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| Keywords | concentrated sulfuric acid titania 二氧化钛 焙烧动力学 高钛渣 roasting kinetics 浓硫酸 high-titanium slag |
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| Title | 浓硫酸焙烧高钛渣的反应动力学 |
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